How to Fix iPhone X Rear Camera Not Working | Motherboard Repair

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Normally, when the front camera works properly while the rear camera does not, the most possible reason is 1.1V inductor from the rear camera connector is damaged. In this article, we demonstrate how to troubleshoot and repair iPhone X rear camera not working, hope you enjoy our sharing.

Step 1 Function Test

We received an iPhone X from our customer who claimed the rear camera is not working. Through our test, all other function including the front camera works properly.

Normally, when the front camera works properly while the rear camera does not, the most possible reason is 1.1V inductor from the rear camera connector is damaged. Next, measure the diode resistance of the rear camera connector J3900.

Step 2 Troubleshoot

When taking down the motherboard, we found the motherboard hasn’t been repaired. Additionally, the diode resistance of the rear camera connector J3900 pin 28 is measured open. According to our repair experience, the pin 28 open diode resistance is mainly due to the poor soldering of the inductor FL3903.

Step 3 Diagnosis

Take off the foam pads on the rear camera connector, the inductor FL3903 is found fallen off. The inductor FL3903 works as a filter, ideally repair by replacing the inductor or you can also make a jumper to repair.

Step 4 Repair

Add solder flux, add tin on the inductor solder pads with the soldering iron, then connect the FL3903 with the copper wire, and clean off with the PCB cleaner. The diode resistance is remeasured normal, reattach the foam pads back.

Step 5 Assemble & Test

Reassemble the iPhone and test, the rear camera works properly, repair completed.

Please refer to below detailed video:

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Tools and Materials Used in This Video:

DC Power Supply

Solder flux

Microscope

Soft brush

Copper wire

Connector foam pads

PCB cleaner

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